The Automobilist's Mechanical Cost Keeper 



It tells the mileage of the car, the life of each 

 tire, and the gasoline and oil consumption 



TOf 



THE latest device for the convenience 

 of the automobile owner who desires 

 to keep a complete record of his car 

 operation is an instrument on which can be 

 read at will the car 

 speed, the trip mile- 

 age, the total mile- 

 age, the mileage of 

 each of the four tires 

 in use, the two spare 

 tires usually carried, 

 the gasoline and oil 

 consumption and 

 warnings at 500 and 

 1,000 miles of run- 

 ning to indicate that 

 adjustments, greas- 

 ings, etc., are neces- 

 sary. These thirteen 

 records can be read 

 as desired. 



The device is no 

 larger than the ordi- 

 nary speedometer 

 and is mounted on 

 the dashboard in the 



the fuel tank or oil into the engine crank- 

 case. 



As shown in the accompanying illustra- 

 tions, the thirteen odometers, nested within 

 a casing on the oppo- 

 site ends of parallel 

 shafts, are covered 

 by a ring-dial, 

 around the circum- 

 ference of which are 

 divisions for each of 

 the thirteen records. 

 In the dial face is a 

 slot in back of which 

 the various odom- 

 eters are moved ac- 

 cording to the record 

 desired. Those 

 odometers to the 

 right of the nest, as 

 shown, are slid over 

 to the left on their 

 shafts by means of 

 turning screws on 

 the face of the in- 

 strument so that the 



The device con- 

 sists of thirteen 

 separate odome- 

 ters, operated in 

 sequence by a 

 series of spring- 

 pawls in a casing 

 surrounded by a 

 ring dial having 

 thirteen parti- 

 tions for records 



'Dial" : 



This OdomeTer slid to 

 --.jefT To register 

 "th slots in face 



KLw the mileage of tire No. 4 is 

 recorded on the instrument 



conventional manner. It is driven by 

 means of one flexible cable to the front 

 wheel or to the engine propeller shaft, as 

 desired, and consists of thirteen separate 

 odometers, operated in sequence by a 

 series of spring-pawls. All of the readings 

 are obtained from the mechanical operation 

 of the odometers and of the driving means, 

 with the exception of the gasoline and oil 

 records, which are manually operated and 

 must be set each time gasoline is put into 



Turning screws slide the odometers 

 from right to left on their shafts 



figures register properly behind the slots 

 in the dial, the latter being turned in the 

 same operation. 



When a new vehicle is purchased and the 

 device attached, all odometers are set at 

 zero. The speed in miles per hour, the 

 trip and total mileage are registered in the 

 usual manner ; one odometer serves to 

 give the same reading on each of the four 

 tires fitted. If tire No. 1 was removed at 

 1,000 miles, the face of the dial would be 



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